Hi Sursounders,
I wonder if you might be able to help - I have a core sound Tetramic that
needs repair and I'm looking for someone in the UK that is qualified to do
so.
I have owned the mic since 2015 and it has already been back to the US for
a repair in spring 2018. It now appears to have developed another fault,
similar to the first but on another capsule (see later), but the cost of
sending to the US, wrangling with customs to get it back (£85 shipping and
I got stung £138 to get it back into the UK last time) and the thought of a
long period of downtime rather puts me off and I would like to explore UK
based options first.

From correspondence with Len Moskowitz, I understand the previous fault was
hard to diagnose - output one was suffering from a intermittent crackle
followed by a very loud pop, but when at Coresound for repair it failed to
exhibit this. Not wishing to have the mic returned and find it still not
working, the FET ring in capsule one was replaced and, after recalibration,
the mic was returned. Sure enough, the problem was gone, but I now have
another issue with sudden pops on output three - very frustrating!

An A format recording of the fault can be found here:
https://drive.google.com/drive/folders/1bcvyCN1hBgP_aBZ_UIrKZLS6j82Ejowa?usp=sharing

My studio is my business and I can't afford this kind of regular repair
cost and downtime, so a UK based repair option would be most welcome.  Any
suggestions?

As an addition to this, has anyone else had this kind of problem? I work in
the Scottish West Highland, just north of Oban. It is more humid here than
much of the UK and I have experimented with warming the mic near the stove
which can sometimes alleviate the issue for a short time. The mic housing
is brass and I wonder if condensation might be a factor? Having said that,
I have a wide selection of mics here from 50's ribbons to modern capacitors
and have never experienced this issue with any other mic. Also, when the
Tetramic was new (and also following repair) it worked perfectly at all
times of year, so I'm not sure that theory might be a red herring!

I would like to add that this is not a rant or a jibe at Len or coresound.
In fact, it is so frustrating because I hugely value the Tetramic - it is
in use on every session and I can't imagine making recording without it
now, but the lack of reliability is sadly forcing me to look at other
options.

Warm regards to all,

Jamie Smith
Composer. Recording Engineer. Music Educator.
www.stmarys.space
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